CBS expects broadcast TV's overall ad revenue to remain steady in 2017. Excluding the effects of the Summer Olympics, broadcast TV ad growth next year will be about 4%, roughly in line with 2016, David Poltrack, chief research officer at CBS, said. The TV ad market is showing more stability compared to the last several years, and an increase in GDP growth, an acceleration in consumer spending, wage growth and pickup in retail sales are positives for 2017.